I am a fan of drymistat tubes, although I cant speak to other brands if there are any. I find they are especially effective in smaller spaces (herfador, 20-40ct humidors, etc). Two of my larger humidors have drawers in the bottom of them, which was a problem since my humidifiers are above them in the main unit - humidity in the drawers usually lagged the rest of the humi. Tossed a drymistat tube in the drawer and voila - problem solved.

Use distilled water in them, not any of the solutions. I started out using these and like them. I still use them today in combination with beads. Note that the tubes will take in humidity like they claim, but I found it to be reeeeeally slow, so sometimes my humidity would creep up in the summer.

So I think they are a great, cheap and easy starter humidifier if you are watchful. They don't hold as steady as beads but they do the job well.

love the tubes! I find them less "awkward" than the jars when Im trying to find a place for them in my humi. They work very well and last for a LONG time (obviously needing to be refilled, but thats it for maintenance).

It is the same gel that is used in the humi pillows. They work well but the pillows are a better deal and hold the RH rock solid. I even seen some new large size pillows at a retailer in FL. I use about 15 or so in my huge bin and they work great. I keep them in a separate open plastic bag resting on top of my cigars and I have zero problems and will never look back. They also sell plastic tubs of the stuff as well but again. the pillows are a better value ounce for ounce. $5 get you 12 at a competitor site and cigar.com send them out with the sticks, Cheap, easy, and works great. Don't need to add any PG, just distilled water. If the RH starts climbing you could add PG but I'd just toss them and get a new ones. Just my $0.02. Good luck.